su debug test fail

COMMAND:    /opt/ltp/bin/ltp-pan  -e -S   -a 2734     -n 2734  -p  -f /tmp/ltp-lhXV8C6vEw/alltests -l /opt/ltp/results/LTP_RUN_ON-2017_07_17-18h_47m_00s.log  -C /opt/ltp
/output/LTP_RUN_ON-2017_07_17-18h_47m_00s.failed -T /opt/ltp/output/LTP_RUN_ON-2017_07_17-18h_47m_00s.tconf
LOG File: /opt/ltp/results/LTP_RUN_ON-2017_07_17-18h_47m_00s.log
FAILED COMMAND File: /opt/ltp/output/LTP_RUN_ON-2017_07_17-18h_47m_00s.failed
TCONF COMMAND File: /opt/ltp/output/LTP_RUN_ON-2017_07_17-18h_47m_00s.tconf
Running tests.......
<<<test_start>>>
tag=su01 stime=1500317225
cmdline="export TCbin=$LTPROOT/testcases/bin;su01"
contacts=""
analysis=exit
<<<test_output>>>
incrementing stop
This script contains bashism that needs to be fixed!
Machine type is: linaro-linux

usermod: group 'trusted' does not exist
usermod: group 'trusted' does not exist
Starting 'su' Testing

TEST: su with no parameters and correct password
spawn /bin/su -c whoami
Password:
root
spawn su -c /bin/su root -c "echo \$TEST_LINE > /tmp/TEST_ENV_FILE_ROOT"
Password:
/bin/su with correct password & enviroment check ( PASSED )

TEST: su with no parameters and incorrect password
spawn /bin/su -c whoami
Password:
su: Authentication failure

displayed_error=1
exit_code=1
pid=2905
/bin/su with incorrect password ( PASSED )

TEST: su to root using name parameter and correct password.
spawn /bin/su -l root -c whoami
Password:
root
spawn /bin/sh -c /bin/su -l root -c "echo "\$TEST_LINE > /tmp/TEST_ENV_FILE_ROOT2""
Password: /bin/su -l root with correct password & enviroment check ( PASSED )

TEST: su to root with name parameter and incorrect password.
spawn /bin/su -l root -c whoami
Password:
su: Authentication failure
/bin/su -l root with incorrect password ( PASSED )
TEST: su to user1 with name parameter and correct password.
spawn /bin/su -l su_usr2 -c whoami
Password:
mesg: cannot open /dev/pts/5: Permission denied
su_usr2
spawn /bin/sh -c /bin/su -l su_usr2 -c "echo "\$TEST_LINE > /tmp/TEST_ENV_FILE_USER""
Password: /bin/su -l su_usr2 with correct password & enviroment check ( PASSED )
TEST: su to user1 with name parameter and incorrect password.
spawn /bin/su -l su_usr2 -c whoami
Password:
su: Authentication failure
/bin/su -l su_usr2 with incorrect password ( PASSED )
TEST:  su to user1 with the user1 password expired.
spawn /bin/su -l root -c passwd -e su_usr2
Password:
passwd: password expiry information changed.
spawn /bin/su -l su_usr2 -c whoami
Password:
You are required to change your password immediately (administrator enforced)
su: Authentication token manipulation error

i_am_correct=0
exit_code=1
pid=2954
/bin/su -l su_usr2 with expired correct password ( FAILED )
spawn /bin/su -l root -c passwd su_usr2
Password:
New password: <<<execution_status>>>
initiation_status="ok"
duration=19 termination_type=exited termination_id=1 corefile=no
cutime=30 cstime=88
<<<test_end>>>
INFO: ltp-pan reported some tests FAIL
LTP Version: 20170516

       ###############################################################

            Done executing testcases.
            LTP Version:  20170516
       ###############################################################

root@hikey:/opt/ltp#